Question

Arătați ca: sin 45-cos45+cos60=1

Answer 1

Răspuns:

$\frac{ \sqrt{2} }{2} - cos(45) \: + \: cos(60) \\ \frac{ \sqrt{2} }{2} - \frac{ \sqrt{2} }{2} + cos(60) \\ 0 + cos(60) \\ 0 + \frac{1}{2} \\ \frac{1}{2} = 0.5 \: care \: rotunjit \: inseamna \: 1$